Merge pull request #3413 from zsfelfoldi/light-topic4

les, p2p/discv5: implement server pool, improve peer selection, light fetcher and topic searching

1 files changed, 11 insertions, 0 deletions

diff --git a/light/lightchain.go b/light/lightchain.go
index 1cea7a892..d397f5006 100644
--- a/light/lightchain.go
+++ b/light/lightchain.go
@@ -505,3 +505,14 @@ func (self *LightChain) SyncCht(ctx context.Context) bool {
 	}
 	return false
 }
+
+// LockChain locks the chain mutex for reading so that multiple canonical hashes can be
+// retrieved while it is guaranteed that they belong to the same version of the chain
+func (self *LightChain) LockChain() {
+	self.chainmu.RLock()
+}
+
+// UnlockChain unlocks the chain mutex
+func (self *LightChain) UnlockChain() {
+	self.chainmu.RUnlock()
+}